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5Wdeming

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    5Wdeming 5Wdeming Presentation Transcript

    • By William Deming
    •  When heat isn’t added or subtracted, they result in being compressed or expanding Air expands as you elevate your position in the atmosphere Air expands as it cools and air compresses as it warms
    •  Elevated terrains act as barriers to air flow Once air has moved to the leeward side of say a mountain, most of it’s moisture has been lost. This affect is why most areas may be cut off by mountains yet be completely different on both sides. Ex: wet and moist on the windward, and then hot and dry on the leeward
    •  It is When masses of warm air and cold air collide Cooler denser air acts as a barrier which the warmer less dense air rises over.
    •  When ever air in the lower atmosphere flows together Because the flowing air cannot go down, cloud formations may occur
    •  During summer days unequal heating of earths surface may cause small areas of air to be heated up more then the surface it surrounds This air will move upward since it is heated, helping animals like birds or humans during activities like hang gliding
    •  Stable air resists vertical movement Unstable air rises freely Clouds formed from the forced movement of this stable air are typically widespread and have little chance of precipitation. Clouds of unstable air typically tower and can cause thunderstorms
    •  When water vapor in the air changes into a liquid or a gas turning into a liquid state Ex: rain, dew, fog, or clouds Occurs when a vapor is cooled or compressed to its’ saturation limit
    •  Cirrus – Clouds in the atmosphere that are shown and are explained as thin wispy strands Cumulus – More vertical in their development, they have edges that are easily visible Stratus - Flat and hazy feature less clouds that may produce a drizzle of rain
    •  Ex: Cirrus, Cirrostratus, and cirrocumulus – 6000 meters Not considered precipitation making clouds
    •  Altocumulus – 4000 meters A light snow or drizzle may happen with these clouds
    •  Stratus, stratocumulus, and nimbostratus – 2000 meters May produce light precipitation
    •  Bases in low height range, but they often reach upwards to the middle or high ranges Can produce very strong rain showers or thunderstorms
    •  No physical difference between fog and a cloud, just height Can form on cool nights where earths surface is cooled very fast by radiation . Later in the night a thin layer of air is cooled before dew point and becomes denser, thus fog Cool air over warm water may evaporate and help create saturation , when this meets cold air, it condenses with warm air below
    •  The creation of precipitation in the cold mid to upper layer clouds. Creates cold rain or ice crystals Super cooled water droplets or ice crystals must be in the cloud together for the BP to occur
    •  Water absorbing particles like salt can remove the water vapor from the air and help create large raindrops When these droplets move through a cloud, they form together with smaller droplets.
    •  Rain – Requires a think layer of the atmosphere that is above freezing and is caused by condensation of water vapors turned into droplets Snow – Forms in a motion of upward air near a low pressure system where the temperature must be below freezing
    •  Sleet – clear ice formed by a layer of air above freezing temperatures that lays over a subfreezing layer near the ground Glaze – occurs when freezing rain hits a surface and creates a formation or sheet of ice around or on an object Hail – A solid precipitation, which forms in strong thunderstorms, mainly ones with very strong updrafts